Alert archive / Georgia / Mesoscale Discussions in 2019

Mesoscale Discussion 398

April 19, 201912 counties in Florida; 82 counties in Georgia

The Storm Prediction Center issued this mesoscale discussion at Apr 19, 2019, 9:09 AM EDT for 12 counties in Florida; 82 counties in Georgia. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued
Apr 19, 2019, 9:09 AM EDT (13:09 UTC)
Expired
Apr 19, 2019, 11:15 AM EDT
In force
2 hr
Issued by
the Storm Prediction Center
All 94 counties

Columbia County, FL, Dixie County, FL, Gadsden County, FL, Gilchrist County, FL, Hamilton County, FL, Jefferson County, FL, Lafayette County, FL, Leon County, FL, Madison County, FL, Suwannee County, FL, Taylor County, FL, Wakulla County, FL, Atkinson County, GA, Bacon County, GA, Baker County, GA, Baldwin County, GA, Barrow County, GA, Ben Hill County, GA, Berrien County, GA, Bibb County, GA, Bleckley County, GA, Brooks County, GA, Butts County, GA, Calhoun County, GA, Chattahoochee County, GA, Clarke County, GA, Clinch County, GA, Coffee County, GA, Colquitt County, GA, Cook County, GA, Crawford County, GA, Crisp County, GA, Decatur County, GA, Dodge County, GA, Dooly County, GA, Dougherty County, GA, Echols County, GA, Glascock County, GA, Grady County, GA, Greene County, GA, Hancock County, GA, Henry County, GA, Houston County, GA, Irwin County, GA, Jasper County, GA, Jeff Davis County, GA, Johnson County, GA, Jones County, GA, Lamar County, GA, Lanier County, GA, Laurens County, GA, Lee County, GA, Lowndes County, GA, Macon County, GA, Marion County, GA, Miller County, GA, Mitchell County, GA, Monroe County, GA, Montgomery County, GA, Morgan County, GA, Newton County, GA, Oconee County, GA, Oglethorpe County, GA, Peach County, GA, Pike County, GA, Pulaski County, GA, Putnam County, GA, Randolph County, GA, Rockdale County, GA, Schley County, GA, Spalding County, GA, Stewart County, GA, Sumter County, GA, Talbot County, GA, Taliaferro County, GA, Taylor County, GA, Telfair County, GA, Terrell County, GA, Thomas County, GA, Tift County, GA, Treutlen County, GA, Turner County, GA, Twiggs County, GA, Upson County, GA, Walton County, GA, Ware County, GA, Warren County, GA, Washington County, GA, Webster County, GA, Wheeler County, GA, Wilcox County, GA, Wilkes County, GA, Wilkinson County, GA, Worth County, GA

The radar

The Moody AFB radar (KVAX), 99 km from the middle of the area, began a volume at 13:12 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The watches that followed

Watches SPC issued over any of the same counties within four hours of this discussion.

The nearest sounding before it

Tallahassee Rgnl, FL (KTLH), launched 12:00Z, 1.2 hours before the alert went out and 130 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-pSkew-T log-p diagram, Tallahassee Rgnl, FL at 12:00Z on 2019-04-19Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 934 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Tallahassee Rgnl, FL at 12:00Z on 2019-04-19The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 203 square meters per square second.1939587897Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
934 J/kg
Mixed-layer CIN
-10 J/kg
Mixed-layer LCL
722 m above ground
0-6 km bulk shear
33 kt
0-1 km storm-relative helicity
203 m²/s²
0-3 km storm-relative helicity
229 m²/s²
Significant tornado parameter
0.9
Supercell composite
9.5

Open this sounding in Storm Lab

The text

As transmitted.

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SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Apr 18, 9:54 PM EDTMesoscale DiscussionSPCCalhoun, Holmes, Jackson, Walton, Washington96 min
Apr 19, 12:44 AM EDTMesoscale DiscussionSPCEscambia, Holmes, Okaloosa, Santa Rosa, Walton, Washington2 hr
Apr 19, 1:33 AM EDTTornado WatchSPCBay, Calhoun, Dixie, Escambia, Franklin, Gadsden and 14 more9 hr
Apr 19, 3:42 AM EDTMesoscale DiscussionSPCBay, Calhoun, Franklin, Gadsden, Gulf, Holmes and 7 more2 hr
Apr 19, 6:28 AM EDTMesoscale DiscussionSPCBay, Calhoun, Franklin, Gadsden, Gulf, Jackson and 4 more2 hr
Apr 19, 10:13 AM EDTTornado WatchSPCAlachua, Baker, Bradford, Citrus, Clay, Columbia and 21 more6 hr
Apr 19, 1:20 PM EDTMesoscale DiscussionSPCBrevard, Charlotte, Citrus, Clay, Collier, DeSoto and 25 more85 min
Apr 19, 1:36 PM EDTSevere Thunderstorm WatchSPCBrevard, Charlotte, Collier, DeSoto, Glades, Hardee and 16 more8 hr
Apr 19, 3:40 PM EDTMesoscale DiscussionSPCBrevard, Charlotte, DeSoto, Glades, Hardee, Hendry and 12 more95 min
Apr 19, 7:11 PM EDTMesoscale DiscussionSPCBroward, Martin, Miami-Dade, Monroe, Palm Beach, Saint Lucie94 min
Apr 18, 8:22 PM EDTSevere Thunderstorm WatchSPCBartow, Butts, Carroll, Chattahoochee, Chattooga, Cherokee and 34 more7 hr
Apr 18, 10:29 PM EDTMesoscale DiscussionSPCBartow, Carroll, Chattahoochee, Cobb, Coweta, Douglas and 10 more91 min
Apr 19, 10:06 AM EDTMesoscale DiscussionSPCBaldwin, Bibb, Bleckley, Columbia, Elbert, Glascock and 21 more84 min
Apr 19, 10:31 AM EDTTornado WatchSPCElbert, Hart9 hr
Apr 19, 10:44 AM EDTTornado WatchSPCBaldwin, Bryan, Bulloch, Burke, Candler, Chatham and 29 more5 hr
Apr 19, 1:19 PM EDTMesoscale DiscussionSPCBryan, Bulloch, Burke, Candler, Chatham, Columbia and 22 more86 min

Nearby

Mesoscale Discussions in Georgia, 2019Mesoscale Discussions in Florida, 2019Every mesoscale discussion in 2019

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.